As a less-experienced photographer, my opinion probably doesn't hold as much weight as some others, and should be taken with a grain of salt. That said, my thoughts:
My tastes lend to this being your strongest shot-
It's a very pleasing angle, with good color and you are contrasted BEAUTIFULLY against the black background. It could use a little adjustment - light moved slightly more in front of you to catch the shape of your face a little better, not quite so harsh so that it blends more with the shaded parts of your skin, things like that. But in general, it's a lovely picture.
A few of your pictures are overexposed to where they damage the look of your better features. Unfortunately, they look like they would also be some of the best pictures of you otherwise.
In particular, you tend to keep a very tense facial expression. Of course, this isn't something that's specific to you - I've realized that it happens a lot in pictures I'm taking, so I'm trying to learn how to coach people out of it and how to bring out emotion in them. The overexposed pictures seem to pretty much fall on the ones where you were being more expressive and the bright highlight is really messing up the definition of what you're putting out there.
Your poses in general seem good, but I think it would benefit you quite a bit to bring more emotion through. Also, try to keep the photographer from using quite so harsh of lighting. Get them to check it more as they're going to get that shading to blend more smoothly and keep some more definition on your face.